Dishwashing machine



DISHWASHING MACHINE Filed March 4, 1943 2 Sheets-Sheet l Flos.

47 roe/VEK July 29, 1947. 1 PEDERS'EN 2,424,77@

DSHWASHING MACHINE Filed March 4, 1943 2 Sheets-Sheet FIG. 5

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Patented July 29, 1947 1 UNITED {,sTA'rEs PATENT, y 955mg y;

DISHWASHING MACHINE .z y.follavedersi;Kn, luenen.'Mo.A y.'ApplicationMarch 4, 1943, Serial No. 478,019

1 claims. (c1. 1344-186) j j invention relates to improvements indishwashing machines, and more particularly to an improved assembly forthe semi-automatic cleansing of dishes or-similar groups of relativelysmall units.'v A number of machines of a great variety have heretoforebeen devised for the minimization of the substantial time and effortinvolved in the manual cleansing of dishes, both for domestic use and incommercial estab- 'lishments; so far -as 4is known, however, none of themachines thus far devised hasmet with any considerable commercialsuccess or public favor. The shortcomings of existing designs to dateincludea high first cost, inordinate expense for service attention andrepair, diillculty of frequent cleansing of machine without considerableeffort and a protracted out-of-service period and, probably mostimportantly, inefficient cleansing operations. There has heretofore beenrequired, in use of older machines, an expected supplemental manual.washing of queensware,

silverware and like articles. The present invenytion has as its generalobject, to overcome'entirely, or at least to minimize the severalobjections heretofore noted in respect to former designs; of'dishwashing machines of the type noted.

.More particularly stated, thepresent invention objectively attains animproved arrangement of parts in a semi-portable washing .cabinet.' suchthat all Lparts ofthe machine necessary to becleaned, or requiringservice attention,- rnay easily be removed from the enclosing cabinetfor these purposes, and as readily replaced to restore the apparatus toservice.- f kYet` another object of the invention is attained in animproved design and arrangement of all pipingVK and liquid-containingelements of the apparatus so that, except atvery wide intervals, Atheentire assemblyv may .readily be cleaned manually or with the aidofcleaning brushes, by manual access from the exteriorl of the enclosingcabinet. i

Perhaps a. vmost important objective vof the `invention is attained inapparatus for the purpose notedwhich possesses an unusually thoroughcleansing action .on the articles or units washed therein. i

A still further object of .the invention is ati tained in an Yimprovedarrangement of valved ports or passages for the washing liquid, enabling-easy manual access to the ports and the valves therefor, andfacilitating brush cleaning of these parts.

Akin to the foregoingobject is notedv an imi .proved arrangement of lallconduits and piping such that sharply angular bends 'are avoided, as areundesirable dirt traps, pockets. andy other zones of accumulation offoreign matterin a device of the type in which the. improvementsareThere may be further mentioned as objectively attained in the presentdesign, a. structurallyand mechanically simplied arrangement of but few`necessary inc ivingparts,l andan assembly which lends itself toproductionalmost entirely with readily availablestock materials, vandwhich requires but a minimum of tooling expense for production; andassembly. i

The foregoing and numerous additional objects will more clearly appearfrom the following detailed description of parts of an exemplaryembodiment of the invention, particularly when considered in connectionwith the accompanying drawing, in whichi. x H

Fig. 1 is a somewhat reduced front elevation of the assembly as housedin a. vertical'cabinet;

Fig.A 2 is a vertical sectional elevation taken approximately on line2-'2 of Fig. 1 and drawn to a somewhat larger scale;

, Fig. 3 is a vertical sectional elevation as'iviewe along line 3-3 ofFig. 2;.

viewed along line 4 4 of Fig. 3;

Fig. 5 is yan enlarged vertical sectional ele-` vationgas taken` alongline 5-7-5 ofFig. 4, and

Fig.v6 -is a vertical `section of a fragmentary upper portioniof acentral riser pipe and portions o f a rotatable spray manifold intheupper part of the washingcompartment ofthe device. Referring nowbycharacters o f reference to the drawing, the structure -is bypreference enclosed in a cabinet or the like which is characterized by aminimum of external protuberances ory control elements in ordery tomake'for cleanness of appearance and ease of external cleansingattention. The cabinet, indicated generally at I0, includes a front wallIl, side walls I2 and,` I3, a rear wall `|4,'and ahinged .upper lid ortop closure I6.4 The latter is swingably mounted lby Ahinge elements Il,`along i its lrear margin. as shown by Fig. 2, so as topermit the lid tobe raised upwardly toelear an access jcpening 20.. As ,will appear, thisopening serves to permit the introduction of dishes to, and theirremovalgfrom an upper washing compartment 2| within the cabinet. y Y* As.a preference, the upper rearmostj marginal y portion of the lcabinet isof stepped construction mounted the bottom member 24: of the cabinet.

The internal construction of lthe cabinet and arrangement of partstherein isj perhaps best shown by Figs.l 2, 3 and 5, wherein, appears `asubstantially. horizontal or transverse ,partition eX- emplied by thedeck structure .2,5., This is by `preference given arslight slopetowardy thefrear4 3 wall I4 of the cabinet.v Since the deck 25 serves asthe bottom member of the washing compartment 2 I, this slope servestoassure at times a flow of the accumulation of washing liquid to valvedports for the return thereof into the circulation system as will latermore fully appear.

The deck structure 25, together with the conduit and tank elementsassociated therewith, may be made removable as a unit from the cabinet,as forservice or cleaning. Triangular supports such as 26 (Fig. 5) mayserve as rests for the deck; if the latter be made removable, flanges 21may be formed upwardly of the deck, to extend the full height ofcompartment 2|. If deck 25 be affixed in place, a shorter ilange may besecured in water tight relation within the cabinet, and serve to receivescrews, bolts or the like, which (not shown) may be employed to x theanges and deck inv assembled position. The brackets 26 may, forexample', be welded interiorly of the walls Ii, I2, I3 and I4.

Supported by and shown in suspended relation tothe deck 25 are a pair ofreservoirs such as tanks 30 and 3l, each provided with flanges 26 on itsupper marginl through which the tanks are secured as by welding (ordetachably by bolts `il desired), to the deck structure. The tanks 30and 3| are or may be similar in construction and arrangement,and-substantial duplicates of each other, hence a description of onewill suilic'e for both. As preferred, each of the tanks is air vented inany suitable manner (not shown), and is provided in assembly with avalved port or passage 32, controlled preferably by a tapered plug valve33. Immediately below and aligned with the valve port 32 is a similarvalve port 34 controlled through a plug valve 35. Spaced laterally fromthe aforesaid valve assembly is a further plug valve 36 controlling avalve passage 31. Above and in line with the valve seat 31 is aconsiderably larger opening 40, normally closed as by a threadedclosurenelement 4I. VIt will be noted as a preference that the openingor passage 40 is of substantial. size, preferably such that, uponremoval of the closure 4I, hand cleaning of the tank may be easily andreadily effected.

As an arrangement for actuating the paired plug valves 33 and 35, it ispreferred to provide valve 35, the smaller and lowermost of the pairedplug valves, with an actuating rod.42 which extends upwardly to a zoneof convenient access just above the stepped portion of the cabinet,where it is provided, for example, with an actuating knob or ball 43.The plug valve 33, reciprocally operable like valve 35, is actuated by ahollow rod' or tubular element 44 which similarly projects to a pointabove the stepped portion 22 of the cabi- 4net and is provided at itsupper end with a balllike actuating knob 45. The reciprocal valveactuating elements are preferably provided with steady brackets 41.These may be formed of a resilient material such as tempered stripmetal, and provided in the form of clipelements such as the clips 41shown in Fig. 3, in engagement with the tubular upward extensions of theclosure elements 4I, so as to provide for the frictional retention ofhollow rod 44 in either a valve-closing,

supported as by bolting indicated in Figs. 2 and 4. In order further tofacilitate removal of the valves and valve actuating assemblies, thestep portion 22 near the upper part of the cabinet is preferably maderemovable, and in this ledge, for further guiding and supporting eiecton the valve operating assemblies. there are provided a plurality ofbushings or thimbles 5I. The step portion preferably surmounted with ahand knob or ball serves as a transverse partition to form a lower ormechanical compartment in the bottom of the cabinet, in whichv there ismounted on the .cabinet base 24 a pump 56 driven as by a belt or othersuitable connection 51 by a motor 60. The latter is convenientlycontrolled as by a motor switch 6I located in an accessible position onthe front of the cabinet, the wiring and connections to the motor beingof any suitable or conventional arrangement. The pump 56 is preferablyof peripheral or rotary type and of relatively high speed, moderatepressure, high volume delivery characteristics. It is provided forexample, with a center inlet eye or tting 62 adjacent which is a Tconnection 63. Branch return pipes 64 and 65 are connected respectivelyto the valved return passages 34 of the tanks 36 and 3|, whereby,according to position of the respective valves 35, either or both tanks30 and 3l maybe putin communication with the pump inlet. Each of thereturn pipes 64 and 65 is removably connected to T connection 63 in anysuitable manner, as. by the coupling elements I25 (Fig. 5). It is herenoted that the valves 36 controlling valve seats or ports 31, serve toestablish drain connections from either or both tanks 36 and 3 I,through a wide-radius return connection 66 directed as t'hrough fitting61, to waste. Conduit 66 is divided preferably centrally intermediatethe tank ends thereof, and has its ports detachably connected as by asuitable coupling |26. Further, waste pipe 61 preferably is detachablyconnected to conduit 66 by a. coupling 121. Attention is alsoparticularly directed to the wide-radius bends formed in the pump returnpiping elements 64 and 65 whereby each of these, as well as the drainconduit 66-61 may be easily brush-cleaned by access through the washingcompartment and ports 32 and 40.

The pump 56 is by furthr preference provided with a central dischargeconnection 10, connected as will later appear, to the spray system.'I'he fresh washing liquid, such as hot water for example, is preferablyintroduced through a water line 1l, thence to a supply line consistingof two branches 12 and 13 each supplied with a'control valve 14. Theactuating handles 15 of these valves extend throughthe front wall II ofthe "cabinet, `whereby to enable separate control of supply flow intothe respective tanks 36 and". In order to permit ready connection anddisconnection of the branches or pipe sections 12 and 13 relative to therespective tanks 30 and 3|, each is y detachably connected to its tankby a coupling |29 as indicated in Figs. 2 and 3, which may be of anysuitable, well known character.

It should here be noted that the device is fully operative according tointended function, by utilizin'g only a single one'of the tanks 30 or3|. Although the preference is to duplicate these tanks with theirindividually appurtenant elements whereby one such tank `may be employedfor soapy water and the other for clear water for rinsing purposes,either tank may be so employed for either purpose. In the events eitherthat no extraneous supply of hot water is readily available, or in casethe machine is used for extended times as in commercial usage, it isdesirable to raise or to maintain the temperature of either or bothwashing and rinsing water. There is provided for this purpose a pair ofheating elements 16 and 11 (Fig. 3) shown as electric heater units, andcontrolled respectively by the switches 80 and 8| on the front panel I Iof the cabinet just above the mechanical compartment (Fig. 1).

Proceeding now to a description of the spray assembly in a preferredform, it will appear from Fig. 2 that in fluid connection with the pumpoutlet fitting 10, is a vertical column or riser pipe 82. The wholecolumn assembly extends vertically from the pump, and preferably in astraight line to the upper portion of washing compartment 2|. Bypreference also the column or riser 82 is formed of a plurality ofthreadedly connected, hence readily detachable sections, the lowermostof which issecured directly tothe pump, an intermediate portion ofwhich, indicated at 83, consists of a cross connection forming part of ahorizontal, stationary manifold element 84, provided with a number ofupwardly presented spray openings 85. The spray openings 85 are formedin rows over say the upper one-half of the cylindrical surface of themanifold, so as forcibly to project a great number of spray streams bothupwardly and laterally of the lower portion of the washing compartment2|.

Above the threaded section 83 of manifold 84 is a nipple extension 86 onwhich is threadedly carried a reticulate container such as a wire basket81 provided withan inverted conical bottom 90 constituting an invertedspray head to which Water is ,supplied by pressure through openings 9|in the pipe section 86. The basket 81 is preferably employed during dishwashing, as a receptacle for silverware orl other smaller articles',Extended upwardly of the pipe element 86 either integrally therewith orthreaded thereto, is an upper riser section 92 surmounted by arotatable, horizontal, upper spray manifold 93. The manifold 93 is mosteconomically constructed of a central special T element 94 (Fig. 6)threaded into which are a pair of rectilinear horizontal arms 95 and 96,the outer ends of which are closed as by threadedcaps 91 and 98. Therectilinear character of the manifold, and the easy removal of caps 91and 98 are preferred so as to facilitate brush-cleaning of these partswhen desired.

The manifold arms 95 and 96 are each characterized by at least one, butpreferably a small plurality of rows of spray openings |02 which are sodisposed by rotation of the arms 95 and 96 each about its longitudinalaxis in assembly, so as to project their streams on relatively oppositesides of the arms, whereby to set up a turning moment when waterpressure is supplied to the manifold. By varying the disposition of theports or openings of each arm, this turning moment, hence the speed oflmanifold rotation may beregulated within moderate limits.

A low cost and satisfactory-provision for the aforesaid rotation of themanifold 93 is made by the arrangement shown in Fig. 6 for journallingthe manlfoldon the riser section 92. 4The lower threaded portion of T94is provided with` a downward extension |03 a few inphes in length, sovthat the latter telescopes within the pipe 92. A bushing or collar |04is externally secured to this same T portion 94, so that aljournal isineffect provided between parts |03and |04 on pipe end 92. It willfurther appear that, as a preference, there is no threaded connectionbetween this upper manifold assembly 93 and the pipe 92, but that themanifold is supportedby its ownl weight. In order to obviate anytendency of high water pressures to lift the upper manifold from pipe 92there is preferably provided a journal extension |05 having a roundedouter face which normally seats Within a journal socket element |06carried 0n the under surface and near the center of the cover I6 of thecabinet. Thus when cover |6 is closed, the manifold 93 is automatically4posisitioned in jurnalled relation on the riser element 92.

The arrangement of auxiliary containers for dishes or the like withincompartment 2| is a matter of particular requirements of usage,v but itmay be noted that in addition to the silverware basket 81 there arepreferably provided a plurality of wire baskets or the like such as |01.These may be partitioned as desired by cross members (not shown) wherebyto support the dishes at a substantial angle, say at 80 to thehorizontal. whereby to obtain the most favorable action of the sprays. t

Numerous accessories and fittings may desirably be employed vbut neednot be detailed herein. It may however be noted as a preference, inorder to prevent accumulation of excessive amounts of foreign materialsuch as food parti- ,f cles in the tanks and drainage piping, to provideabout the valves, valve passages, etc. related to ports 32, wire guardswhich may be semi-cylindrical in form as indicated at ||0. These aremounted so as to be readily removable for cleaning.

It will have appeared 'as practically desirable to avoid escape ofliquid downwardly along the riser pipe 82 where the latter extendsthrough the deck 25. This may obviously be cared for by packing of anysuitable type, but it has been found entirely satisfactory to provide ashort standpipe or wall element |5 surmounting the opening I6 throughwhich extends the riser.

The manner of usage and function of the apparatus is now thought to havebeen fully apparent from the detailed description of parts, but forbriefness may be reviewed as follows:

The first step of supplying a suitable quantity of water may obviouslybe'eifected by control of one or both of the valves 15, or if desired,`by direct introduction of water to -the washing cham-ber 2|. Suitableg'auge means (not shown) may be provided for either or both of the tanks.30 or 3|. Assuming both tanks to be emp-loyed, say tank 30 as a soapywater reservoir and tank 3| ,as a rinse water reservoir, if the water beinitially introduced to chamber 2|, opening'of both valves 33 will serveto admit substantially .equal'vamounts ofwater to the .two tanks 30 and3| with Valves 35 and 36 closed in eachy tank. Each Uf thevtanks will nowtc'on'tain, as gauged, the requisite amount of liquid. A measuredamount of a suitable soap powder may then advvantageously be introducedsay into tank- 30, l

either directly or through chamber 2|. The soap employed is of,a varietywhich will minimize soap curd and will dissolve readily so as to obviateany effect of larger soap particles in obstructing the smaller nozzleopenings of the spray manifolds. The agitation of rst pumping andcirculation will usually be suillcient to eiect a complete solution ofthe soap powder. Prior to starting the pump motor as through switch 6|,plug valve 33 to tank 3| will be closed, and valve 35 of tank 30 will beopened as will valve 33 to tank 30. The pump is now started, the pumpbeing supplied with liquid through suction pipe 64, and will deliver thewashing liquid to and through the column elements 82, 83, 86 and 92, tothe manifold 93, through-the spray head 90, and through the manifold 84.From these three elements the water or soap solution will be forciblysprayed both upwardly and downwardly, and to some extent laterally uponthe dishes or similar units arranged in wire baskets or the like inchamber 2|. It may ybe-desirable also to arrangeA a plurality of wireshelves (not shown) disposed generally parallel to the manifold 84.These may advantageously be hinged to the side walls l2 and I3interiorly of the compartment 2l.

`As the spray continues to emanate from mani-V folds 84, 93 and upwardlyinto the wire basket 8l, thorough cleansing of the dishes usually cccursin a period of one to two minutes time, but may be continued as long asnecessary or desirable. and, as is usual, succeeded by the step of iclosed, and plug valves 33 and 35 of tank 3| are opened. The pump isagain started, and the c lcar rinse water in' tank 3l will now becirculated by the pump through the pump suction line 65 and againupwardly through the spray assembly into the several manifolds and sprayhead 90 into chamber 2l. This cycle is continued for a, suilicientlength of time, based on experience, to complete a thorough rinsing ofthe dishes. A rinse period of-one-half minute is usually sumcient, solthat the total time required for a, complete cycle of washing andrinsing need not require more than three or four minutes.

' Should it be desired to make a further usage of either or both 'thesoap water in tank 30 and rinse water in tank 3|, the temperaturethereof may be kept up as desired, through the electric.

' is necessary only at wide intervals, the present construction isadapted to permit such work in the average household without `expensiveserviceV calls. It will have been observed that upon lift- 4 'ing theremovablestep element 22 of the cabinet and release of the valveactuating members from the, steady brackets 41,. it 'may be easilypossible .toclear the deck structure 25 of these valveoperating membersand their adjuncts. The provision, forA example, of a larger valve port32 above a smaller one 34 in each of the tanks,.en

ables a ready withdrawal of the paired valves through the upper andlarger opening'. This feature works to advantage not only in the ease ofremoval and assembly of valves and valve actuating members, but enablesthe deck 25 to be cleared of these parts so that the tanksdeck andpiping may more readily be removed as a unit from the interior of thecabinet. To accomplish this removal the pipe connection of riser 82 intothe pump as shown at 10, is readily unthreaded, as lis also theconnection of the paired pump suction pipes 64 and 55, through thecouplings at the T connection therebetween, and the pump inlet 62.Similarly, the supply pipes may be disconnected from the tanks 30 and3|, as by unthreading the couplings in short sections between the valvesand the respective tanks. Ready access to chamberfor removal of theelements above indicated, is afforded through a cabinet opening H9 (Fig.2), the opening normally being closed by a removable panel -or cover |20(Figs. 1 and 2). Any fastenings employed between the flanges 21 of desk25 andthe walls of the cabinet, should be of readily detachable type.These are detached, following which the upper manifold 93 is lifted fromriser 92 for convenience in handling the `deck structure 25 and allappurtenances. The assembly is then tilted somewhat, and withdrawn as aunit through the top of the cabinet, whereby to facilitate any benchcleaning, repair or replacement attention found necessary.

A review of the objectives of the present design as above expresslystated and as further implied from the more detailed description, willindicate that' the design fully attains each and all of the purposes andobjectives in the present embodiment thereof.

Although the invention has been described by making detailed referenceto a single preferred example, the detail of description is to beunderstood solely ina descriptive, and not in any limiting sense,numerous changes in the parts, their combinations and arrangements'being' possible within the scope of the claims hereunto ap pended.

I claim as my invention:

1. In a machine for lwashing dishes and the like, an enclosingstructure, a partition separating the structure into an upper washingcompartment and aY lower mechanical compartment, a water i containerbelow said partition, a pump and pump-operating means in the mechanicalcompartment, a spray structure in the washing compartment, a conduitfrom the pump to the spray structure, means providing a port forestablishing communication between the washing compartment and the watercontainer and further means providing a'port to establish a connectionfrom the water container to the pump, a pair of aligned, reciprocallyactuable valves coacting with the respective ports, a hollowreciprocally actuable element foroperating one oi said valves, and asecond reciprocally actuable element for operating the other of saidvalves, extended through said hollow element, the valve operatingelements being disposed substantially at one side of said washingcompartment, and extending outwardly of said compartment to a positionto facilitate manual access in a zone exterior to the enclosingstructure.

2. In a machine for 'washing dishes and the like, an enclosing cabinet,a ysubstantially horizontal deck structure supported within the cabinetwalls, a tank suspended from the deck 9 structure, a liquid supplyycolumn extending vertically of and within the cabinet, the cabinet beingdivided by the deck structure into an upper `washing compartment anda`lower mechanical compartment, a pump in the mechanical compartment, aconnection between said tank and the pump intake, a connection from thepump to said supply column for` supplying washing liquid to the washingcompartment, a plurality of reciprocally operable valves and coactingvalve ports in said deck structure and tank, the ports and valvescoacting to control communication between the washing compartment andthe tank and to control flow from the tank to the pump, coaxiallyarranged, independently operable valveactuating rods one connected toeach of said valves, said rods extending upwardly through said washingcompartment and terminating exteriorly of the cabinet in operatinghandles, and means operatively associated with each rod for retainingthe-rod in any operated position.

3. In a machine for washing dishes or the like, a cabinet provided witha top opening and door therefor, an intermediate deck serving toseparate-the cabinet into an upper washing compartment and a lowermechanical compartment, spray means in the washing compartment, a pumpand pump operating means in the mechanical compartment, a waterreservoir or tank just below the deck, conduit means between said tankand pump and between the pump and said spray opening by way of the topopening of the cabinet,

said closure including a hollow extension proj ecting upwardly throughsaid Washing compartment, an opening in the bottom of said tank invertical alignment with said top-access opening into the tank, a plugvalve for said bottom opening, and a valve operating rod connected tosaid plug valve and extending upwardly through said tank top-accessopening, said closure and said hollow closure extension, the upper endof said rod terminating in an operating handle.

l4. In a dish washing machine, a cabinet, a transverse partition servingto divide the cabinet into an upper washing compartment and a lowermechanical compartment, spray means in the washing compartment, a pumpin the mechanical compartment connected to the spray means, a tank forwater or other washing liquid disposed justbelow-the partition, returnpiping from the tank to the pump and drain piping directed away fromthetank, the elements of said piping being characterized by wide radiusbends, the partition and tank being provided with upwardly presentedvalved openings, those in the tank being in communication with saidreturn and drain piping, a plurality of said valved openings beingarranged in axial alignment whereby to facilitate brushcleaning of theassociated circulation system, said aligned valved openings each beingprovided with an upwardly removable plug type valve element, andcoaxially arranged, independently operable valve actuating rodsconnected to said plug valve elements and extending upwardly throughsaid washing compartment to a zone exteriorly of said cabinet.

5. In a dish washing machine, a cabinet, a

transverse partition serving to divide the cabinet into an upper washingcompartment and a lower mechanical compartment, spray means in thewashing compartment, a pump in the mechanical compartment connected tothe spray -means, a

tank for water or other washing liquid disposed.

just below the partition, return piping from'the tank to the pump, drainpiping directed away from the tank, the elements of said piping beingcharacterized by wide radius bends, and the partition and tank beingprovided with upwardly presented openings arranged in groups, with thoseof each group in axial alignment, and the tank openings of said groupsbeing in communication with said return and drain piping whereby tofacilitate brush cleaning of the entire circulation system, the openingsof at least one aligned group thereof, each being provided with an up`-wardly removable, plug type valve element, coaxially arranged,independently operable valve actuating rods connected to said plug valveelements and extending upwardly through said washing compartment to azone exteriorly of said cabinet, and the cabinet being provided with atop opening provided with a closure proportioned to permit cleaningaccess therethrough, to the several openings and piping.

6. In a machine for washingdishes or like units, a cabinet, a`washingcompartment in the cabinet, a tank for washing liquid, a spray in thewashing compartment, :a pump arranged to supply liquid to the spray, apassage from the washing cornpartment to the tank, a second passage fromthe tank to the pump, a plug type valve assembly for each of saidpassages, the passages being aligned with each other in verticalrelation, the valve assembly for the lowermost of said passages being oflesser area than the valve for the uppermost of said passages, a hollowvalve operating rod for the uppermost valve plug, a rod for thelowermost valve plug extending co'axially through y the said hollowoperating rod, and rod-actuating elements, the actuating element forsaid hollow valve operating rod being adapted for engagement with saidrod for the lowermost valve plug whereby to enable conjoint actuation ofboth valves through movement of said hollow rod actuating element.

7. The combination and arrangement of valved passages in combinationwith a dish washing machine and cabinet as recited in claim 6, furthercharacterized in that the paired valve plugs and operating assembliesare adapted for removal or reinsertion, conjoiritly as a unit, tofacilitate cleaning of the valves and operating assemblies outside ofthe cabinet, the alignment of the valve passages further facilitatingbrush cleaning of the passages by personal access from without thecabinet.

J OHN PEDERSEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS (Other references on following page) Number NameDate Zademach Sept. 20, 1932 Lewis Oct. 24, 1939 Fox June 16, 1942 BildeApr. 8, 1941 Wing Jan. 31, 1922 Hauk Mar. 6, 1923 Tippit Oct. 11, 1910Number v Australia July 8. 1937

